2026 GMC Sierra 1500 Engine Specs & More

From daily driving to heavy-duty hauling, there’s precious little that the 2026 GMC Sierra 1500 can’t do for the Manchester driver. Available in eight unique trims from the baseline Pro to the off-road-ready AT4X and the mighty Denali Ultimate, and powered by no fewer than four engines, the 2026 GMC Sierra 1500 lineup is as formidable as it is versatile. Learn more about the specs of the GMC Sierra 1500 with Tulley Buick GMC here, then visit our dealership in Nashua to tour our inventory.

What Engines Are Available For The 2026 GMC Sierra 1500?

The 2026 GMC Sierra 1500 lineup features four engine options, including the torque-heavy, diesel-powered 3.0L Duramax® engine. Review your engine options below, and contact us if you have any questions:

2.7L 4-Cylinder TurboMax™

• 8-speed automatic transmission
• 310 hp
• 430 lb-ft of torque
• Available Max Tow Up To 9,400 pounds

5.3L EcoTec3 V8

• 10-speed automatic transmission
• 355 hp
• 383 lb-ft of torque
• Available Max Tow Up To 11,200 pounds

6.2L EcoTec3 V8

• 10-speed automatic transmission
• 420 hp
• 460 lb-ft of torque
• Available Max Tow Up To 13,100 pounds

Duramax® 3.0L 6-Cylinder Turbo Diesel

• 10-speed automatic transmission
• 305 hp
• 495 lb-ft of torque
• Available Max Tow Up To 13,300 pounds

If you plan to lease or finance a 2026 GMC Sierra 1500 to do heavy-duty towing, check out our comprehensive 2026 Sierra 1500 towing guide for more information. You can also drop by and speak with our service technicians to get a gauge on the capabilities of this powerful lineup.

How Fuel-Efficient Is The 2026 GMC Sierra 1500?

The fuel efficiency of the 2026 GMC Sierra 1500 varies based on engine and drivetrain. Here’s a quick breakdown of the GMC Sierra 1500 mpg ratings:

2.7L 4-Cylinder TurboMax™

• Up to 18 city / 21 highway mpg

5.3L EcoTec3 V8

• Up to 16 city / 20 highway mpg

6.2L EcoTec3 V8

• Up to 15 city / 19 highway mpg

Duramax® 3.0L 6-Cylinder Turbo Diesel

• Up to 21 city / 24 highway mpg

Generally, 2WD variants of the 2026 GMC Sierra 1500 achieve slightly better fuel mileage than their 4WD counterparts due to several factors. These include weight (4WD systems are generally heavier) and the fact that more complex 4WD systems have more points of contact within the drivetrain, which creates friction and ultimately reduces the vehicle’s overall fuel efficiency. To learn more about the fuel economy of the 2026 GMC Sierra 1500, visit our dealership near Salem, MA or call us at (603) 589-1108 to speak with our knowledgeable associates.

Explore The 2026 GMC Sierra 1500 With Tulley Buick GMC

Whether it’s for daily driving or for heavy-duty hauling, the versatile 2026 GMC Sierra 1500 lineup is fully capable of meeting your needs and more. Visit our dealership near Chelmsford, MA today for a test drive and to learn about the financial incentives we offer.